Question

5) Racing on a FLAT track a car going at 32m/s rounds a curve of 56m radius. a) What is the centripetal acceleration of the car? b) Calculate the minimum coefficient of Static Friction needed, between the tires and the road, to round the curve without skidding e) Determine the BANKING ANGLE on a curve of radius 80m, if the marked velocity to enter the curve is 50 miles/hr. 6) A 5g bullet is fired, horizontally, with a speed of 40m/s to strike a ballistic

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Answer 1

Solution :- Given, v= 32 m/s - Radius, r=56m la) Centripetal acceleration of - the car is, 56 Qc = 18.3 m/s2 OL + 911 c on linimum coedticienl (b) Minimum coefficient of friction is, Ms = 1 g Miste Ms = 1.86

(c) for radius, r= 80m 1. & velocity, v= 50 miles/her = 22.352 m/s Banking Angle (6) is given by, - tan o = w tan = (22.352) 80 x 9.8 tan o= 0.637 z o = tan" (0.637) = 1= 32.5° )